한계상태(限界狀態) 공극수압(空隙水壓) 계수(係數)에 의(依)한 비배수(非排水) 전단강도(剪斷强度)의 예측(豫測) = Prediction of Undrained Shear Strength by Critical-State Pore Pressure Parameter

다국어 초록 (Multilingual Abstract)

The paper was carried out to predict the characteristics of undrained strength by critical-state pore pressure parameter (□_o)
The results were summarized as follows:
1. One of the critical-state theory used in the prediction of strains is the Cam Clay Model assumed that soil is elasto-plastic.
The Cam Clay Model could be easily utilized to analyze and predict the deformation of soil due to structures with the some fundamental soil parameters measured in standard laboratory test.
2. Critical-state pore pressure provides a simple analytical representation of undrained stress-strain behavior, since it is independent of overconsolidation (OCR), intial stress state (K_o)，and level of shear to failure.
3. The advantage of using the critical-state pore pressure (□_o) against Skempton’s pore pressure parameter (A_f) and Henkel’s pore pressure parameter (a) is that □_o is constant in a range of OCR valus while A_f and a are variable with OCR.
In this study, Skempton’s pore pressure parameter was rearranged, as a function of OCR using critical-state pore pressure parameter.
4. Modified Cam Clay Model was better than Cam Caly Model for the prediction of undrained strength in normally consolidated range.
5. The variation of undrained strength in overconsolidated range was greater with OCR in Kaolin clay than in Marine clay.
6. Pore pressure in overconsolidated range was varied slightly greater in Marine clay than in Kaolin clay, but reverse was true in normally consolidated range.
7. The proposed critical state pore pressure perameter can describe the pore pressure as a function of strain.